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Related Concept Videos

Hypertension II: Pathophysiology01:29

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Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
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Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
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Hypertension is a widespread, long-term medical condition where blood pressure in the arteries remains elevated. It is characterized by systolic blood pressure readings of 130 mm Hg or above or diastolic blood pressure (DBP) readings of 80 mm Hg or higher. Unmanaged hypertension poses significant health risks, making the distinction between primary (or essential) hypertension and secondary hypertension crucial, as their management and implications vary.Primary HypertensionPrimary hypertension,...
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Hypertension is asymptomatic and also referred to as the "silent killer" until it progresses to a severe stage or causes target organ disease. Patients may experience symptoms stemming from the strain on blood vessels and tissues in various organs or the heart's increased workload.Physical exams might show no abnormalities other than high blood pressure. Signs of vascular damage, when present, correspond to the organs supplied by the affected vessels, leading to target organ damage. For...
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The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
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The Hypertension Pandemic: An Evolutionary Perspective.

Bernard C Rossier1, Murielle Bochud2, Olivier Devuyst3

  • 1Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland; Bernard.Rossier@unil.ch.

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Essential hypertension, a global health crisis, is intricately linked to the renin-angiotensin-aldosterone system (RAAS). Evolutionary insights reveal how RAAS adaptations in humans may contribute to the modern hypertension pandemic.

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Area of Science:

  • Cardiovascular Research
  • Evolutionary Medicine
  • Human Physiology

Background:

  • Hypertension impacts over 1.2 billion globally, representing a significant public health and economic burden.
  • It's a multifactorial condition influenced by genetics, environment, and behaviors, with primary (essential) hypertension accounting for 90% of cases.
  • Understanding blood pressure regulation mechanisms is crucial for managing hypertension.

Purpose of the Study:

  • To review the critical role of the renin-angiotensin-aldosterone system (RAAS) in blood pressure control.
  • To explore the evolutionary history of the RAAS and its significance in vertebrate adaptation.
  • To discuss the evolution of blood pressure regulation in primates and humans, considering genetic factors and the hypertension pandemic.

Main Methods:

  • Literature review of experimental and clinical research on blood pressure control.
  • Analysis of the evolutionary trajectory of the RAAS in vertebrates.
  • Examination of human evolutionary history and genetic factors related to hypertension.

Main Results:

  • The RAAS is fundamental for blood pressure homeostasis and adaptation to terrestrial life.
  • The evolution of the RAAS in primates and humans offers insights into blood pressure regulation.
  • Genetic factors and evolutionary pressures may contribute to the current widespread prevalence of hypertension.

Conclusions:

  • The RAAS plays a vital role in blood pressure regulation throughout vertebrate evolution.
  • Understanding the evolutionary context of the RAAS is essential for comprehending human hypertension.
  • Evolutionary medicine provides a framework for investigating the causes of the modern hypertension pandemic.